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Fertility & Sauna

THE EXPERIMENT

After 100 sauna sessions, Bryan tested his fertility. Without cooling, the results were shocking:

-50%
FERTILITY MARKERS
Wiped out from sauna use
68–72
DAYS TO RECOVER
Once sauna use was ended
“I wondered—am I going to forever be infertile? The answer is no, because if you begin icing now, the body will rebuild.”
— BRYAN JOHNSON
THE SOLUTION
What Bryan uncovered was alarming: sustained heat exposure can rapidly erode male fertility and performance.
Cooling is the defense. SaunGuard™ uses intentional design to deliver discreet cooling exactly where protection is needed most.

SCIENTIFIC STUDIES

Research on heat and male fertility.

The impact of heat on sperm quality has been well documented in scientific literature. Explore the studies below:

TESTICULAR HEATING

Testicular heating and its possible contributions to male infertility by R Mieusset, L. Bujan

Hypothesis to Explain Subfertile Semen

even small increases in temperature from experimental application of external heat can cause disruption by Advances in Experimental medicine and Biology (AEMB, volume 286)

Elevated Intrascrotal temperature

Elevated intrascrotal temperature. I: A hypothesis for poor semen in infertile men. by A W Zorgniotti

Chronic exposure to warm temperature

Chronic exposure to warm temperature causes low sperm abundance and quality in Drosophila melanogaster by Ana Caroline Gandara and Daniela Barbosa

Influence of genital heat stress on semen quality in humans

The concept that an elevation of testicular temperature results in impairment of spermatogenesis is widely accepted... by A Jung and HC Shuppe

Lots More Studies

read many more emerging studies on how sauna protection is crucial for protection